Apparatus for purifying and humidifying air.



W. G. R. BRAEMER. APPARATUS FOR 'PURIFYING AND HUMIDIFYING AIR.

APPLIUATlON FILED OUT. 15, 1907.

Patented Sept. 22, 1908.

35 a given .volume of air, irrespective of t ter of the washer is mvrrnnSTATES PATENT ()FFICE.

WILLIAM G. R. BRAEMER, OF BUFFALO, NEW YORK, ASSIGNOR TO \VARREN WEBSTER& COM- PANY, A CORPORATION OF JERSEY.

' APPARATUS FOR PURIFYING AND Humnrrvme AIR.

5 Im rovement Apparatus for Purifying an Humidifying Air, of which thefollowing is a specification.

My invention hasreference to apparatus for purifying and humidifyingair, and con- 1 sists of certain Improvements which are fully set forthin the following specification, and

. shown in the accompanying drawings, which form a part thereof.

The object of my invention is'to automatically regulate the humidity ofthe air supply to the building or rooms therein irrespectlve of thevariations in the external atmospheric conditions, whereby the air at aproper temperature and humidity may be supplied in 29 quantity wheredesired and unaiiected by the variations in the atmosphere outside ofthe building.

More specifically, 'my object is to provide means forajimparting adefinite amount of humidity to air being supplied to a building toive toit an absolute or fixed humidity whfie varying the relative humidity andtemerature of said air when assing into the building from thehunndiigring a paratus,

30-the change in relative humidity eing secured by varying thetemperature of the air after it has been brought to an absolute or fixedhumidity, so thata definite amount of moisture is conveyed intothebuilding1 with e variationsin temperature of the air'within thebuilding. a s y invention consists in providing a washer and eliminatorwith means for sub- 40 jecting the air to aqueous vapor. pIlOI to itspassing through the eliminator, or' after havmg passed through theeliminator, aspre ferred, and independent of-the washer or thetemperatureof the water thereof, which latter may be maintained constantat a definite erature, and regulating the e aqueous vapor to vary thehuhigh tern sion of t midity of the air controlled by asuitablehumidiostat or other automatic device under 3 the action of the air inthe-building or room onin the flues throu h which it passes. to reachits point of distribution. Thehot wa I given a temperature to bedetermined by test, and adapted to give slightly less absolute. humidityto the air Specification of Letters Patent. Application filed October15, 1907. Serial No. 397,550.

'bined; Ordinarily,

Patented. Sept. 22, 1908. i

than required at the highest temperature of the air leaving the heatingapparatus, the additional humidity required belng provided by steam oraqueous vapor jets above mentioned.

My invention also comprehends details of construction which, to etherwith the features above specified,wilibe betterunderstood by referenceto the drawings, in which Figure 1 is a sectional side elevation ofanapgaratus for purifying and humidifying air; an Fig. 2 is a sectionalplan view of the same.

A is the casing of the apparatus, and adj acent to its inlet side, it isprovided with tempering steam coils B, by which the incoming air may beheated to the desired preliminary,

de ree. Immediately co" s are the usual bypermit more or less 0 the fresinto the humidifying apparatus ing heated by the tempering coils B. Inthis manner, the mixture of the incoming air may be heated tosubstantially the desired degree before being subjected to thehumidifyin treatment. The tempered air is purified an humidified bybeing made to pass through below the tempering air to pass one or moresheets of hot falling water from the spraying pipes D D, the sheets ofhot falling water belng indicated in dotted linesin Fig. 1. Thehumidified air then passes through the eliminator Ew-hich removes thewithout beass dam ers C which excess of moisture, and thence passesthrough the chamber F to the blower G, from whence I it is driventhrough a flue P into the room or. compartment in which it is to beutilized.

he temperature of the waterfrom the spraying .pipesfD D imparts to theair a less humidlty than-re uired at the highest temperature of the aireaving the heatin a aratus' for delivery into the room, and theadditional amount of humidity which is required to make thepredeterminedabsolute or fixed humidity to the air issu plied by means of the steamjets H H or H or both com one set of such jet pipes will suflice. Thepipes H H are shown as 10- cated in the casing A'between the temperingcoils B and the spraying pipes D, so that they implart to the incomingair not only a degree of umidity but also some increase in tem perature,and in that Way the air after passlng through the steamjets and thesheets of hot falling water from the spraying pipes is brought to the reuisiteabsolute humidity, and then passes through the eliminator to ingthe room, and in which case it would have to be raised considerably intemperature because of the drop 1n temperature m transrt.

This increase in temperature to the'humi'di fied air may beproduced bymeans of a steam heater J; J, the former operating upon the humidifiedair before passing into theblower G and the latter operating upon 'itafter it- -leaves theblower.

Either or both of these heaters may be employed as desired. More over,the means for heating the'air to raise its temperature and also itsrelative humidity, while maintainin its fixed or absolute humidity,'maybe 0 the ordinary construction, similar to the tempering coils B withthe bypass controlling devices 0, whereby the amount of heat imparted tothe air may be easily regulated without varying the, steam in the steamcoils.

In case there is any variation in the humidity imparted to the air suchas to produce a variation in the relative humidity. of the heatedyair inthe room when said air is supplied at afixed temperature, then theamount of humidity imparted to the air in the urifying'apparatus isregulated by contro ling the action of the steam jets H H, andthis isaccomplished by the valves K K which are automatically operated by meansof a hu midiostat or other automatic regulating apparatus L arranged inthe room, 1n which'the air is delivered, or arranged in the pipe B, asindicated in dotted lines at L. By means of this humidiostat, thelowerin of the relative humidity in the room, while tie temperatureremains fixed, will-cause it to operate throu h the connectionsM, so asto open the valves li K, or either of them, to a greater extent andermit more steam to pass from the steam ets for the purpose ofincreasing the humidity 1n the air prior to its reaching the blower G.Should the humidity in the room increase above that required, then thereverse operation takes lace with a reduction of the steam jets and aowering of the humidity imparted to the air before reaching the blower.

The tempering coils B and the by-pass dampers C are preferably regulatedautomatically by means of a thermostat N, which may be arranged in theroom to'be heated or which may be arranged in the casing A, as indicatedat N, so as to maintain the incoming air mixture at a fixed temperature,It is, in most cases, preferable that the thermostat shall be in thecasing A, and such thermostat will 0 erate through the devices 0 toregulate t e steam valve B of the tempering proper absolute humidity inthe mined temperature of the room.

coils B and the devices 0 to regulate the bypass dampers C. Where theby-pass dampers O are employed, it is not essential to use the steamregulating valve B because the variation in temperature may becontrolled within reasonab e limits by the dampers C, which are morerapid in inducing changes of temperature.

The water from the perforated pipes D falls in sheets of spray or likerain down into the tank I at the bottom, and the collected water takenfrom the air by the eliminator E is also delivered to this tank. Thetemperature of the water from the pipes D is maintained practicallyconstant in any suitable manner, and this temperature is predeterminedafter deciding upon the maximum tem erature which is required to begiven to the umidified air delivered to the room and should be such asto impart slightly less than the required humidity for the air. Of

course, 1t is evident that this fixed relative humidity which would begiven by the'hot water from the pipes D might be considerably below thatwhich is required, reliance being placedupon the steam ets H H to makeup the deficiency in humidity to secure the purifying apparatus and theproper relative in theroom to be heated. I therefore do not restrictmyself to any fixed amount of humidity to be given by the .pipes D andhot water therefrom, except that it shall be less than the maximumhumidity required.

It is also evident that while the spraying,

pipes H H are designed for producing jets of steam, they maynevertheless .be employed to produce the jets-of intensely hot water,which water might be held under considerable pressure, so that the waterspray would burst into'steam when projected into the casing A. Theeliminator may be made in any suitable manner,

tion, Serial No. 392,251, filed Septem er 11,

ticular construction of eliminator, as this part of the device may bemade in any conven'ient manner. i

The essential feature of my invention is in the combination of the meanswhich impart less than the maximum humidity required with supplementingindependent devices for supplying, under regulation, the additionalamount of humidity required to-produce the absolute humidity necessaryto secure the relative humidity required at the predeter- In-the 'o'eration ofthis a paratus, it will be observed that, assuming t can to beused at a certain temperature and relative humidity,vit becomesnecessary to impart to ature' such, that when the air is raised to thefinal temperature for use, the moisture due that shown being simi' larto the structure set out in my a plicathe air an absolute humidity andtemper-,

umidity 1 vhot aqueous vapor to the current 0 tion.

to the absolute humidity will, with the rarefied air impart a relativelylower and constant relative humidity as compared withperatureunder theseconditions will be that which is required for the building or room.

No claim 1s made in this application to the method of producin air ofpractically constantrelative humi ity hereln described, as the sameiisreserved for a separate applica- While I refer the construction shown asbeing excel ently ada ted for the purposes of my lnvention, the etailsthereof may be modified without departing from the spirit of theinvention.

Having now described my'invention, what I claim as new, and desire tosecure by Letters Patent, is

1.. In an air purifying and humidifying apparatus, the combination ofmeans for producing a current of air, means for supplying a thin body ofhot water of substant1ally constant temperature through which the airpasses, an eliminator for removing the excess of water from the air, andmeans for supply,- ing to the current ofair a hot aqueous vapor to raisethe humidity of the air to the absolute humidity required. '1

2. In an air purifying and humidifying apparatus, the combination ofmeans for producing a current of air, means for su lying 'a thin bodyofhot water of substantia y constant tem'perature th'rough which the, air

passes, an eliminator for removing theexcess of water from the air,means for supplying to the current of air a raise the humidity of theairto the absolute humidity required, and means automatically controlled bythe condition of ered from the apparatus to vary the amount of aqueousvapor suppliedto the air, whereby the absolute humidity thereof may bemaintained constant.

3. In an air purifying and humidifying apparatus, the combinatlon ofmeans for proucing a current'of air, means for sup lying a thin bodyof'hot water of substantla 1 constant temperature through which t e airpasses, an eliminatorfor removing the excess of water from the air,means for supplyin a air before it is treated to the thin body 'of hotwater to raise the humidity of the air to the absolute humidityrequired, and means to regulate the admission of the aqueous va or tomaintain the absolutehumiditylof t e air practically constant. a 4. Inan. air purifying and humidifying apparatus, the combination of meansfor producing a current of air, means for sup lying a thin body ofhotwater of substantia ly constant temperature through which the airpasses, an eliminator for removing the excess hot aqueous vapor to theair deliv-' humidity" required, the

of water from the air, means for supplying a hot aqueous va or to thecurrent of air to raise the humidity of the-air to the absolute humidityrequired, and means to impart preliminary heat to the air before beingtreated to the aqueous vapor and thin body of water.

5. In an air purifying and humidifying apparatus, the combination ofmeans for producing a current of air, means for sup lying a thin body ofhot water of substantia ly con-' stant temperature through which the airpasses, an eliminator for removing the excess of water from the air,means for supplying a hot aqueous vapor to the current of air to raisethe humidity of the air to the absolute humidity required, means toimpart preliminary heat to the air before being treated to v the aqueousvapor and thin body of water,

and automatic devices for controlling the means for impartingpreliminary heat to .maintain the preliminary temperature of the airpractically constant.

' 6. In an air purifying and humidifying apparatus, the combination ofmeans for producing a current of air, means for sup lying a thin body ofhot water'of substantia fly constant temperature through which the airpasses, an eliminator for removing the excess of water from the air,means for supplying a hot aqueous vapor to the current of air to raisethe humid1t of the air tothe absolu'te humidity require and means actingupon the humidified air to lower its relative umidity and increase itstem erature.

' 7. In an air purifying an humidifying apparatus, the combinat on ofmeans for producing a current of air, means for sup lying a thin body ofhot water of substantial H stant temperature I through which the'fairpasses, an eliminator for removing the excess of water from the air,means for supplying a,"

hot; aqueous vapor to the current of air to raise the humidity of'theair to the absolute said aqueous vapor being delivered to the airbothbefore and after being treated to the thinbody of hot water, and meansfor regulating the aqueous vapor to maintain a practically constantabsolute humidity; v

' 8. In an air-purifying and humidifying aparatus, the combinationofmeans for producing a current of air, means for sup lying a thin body ofhot water of substantmlly constant temperature through which the airpasses, an eliminator for removing the excess of water from the air,means for supplying a hot aqueous vapor to the current of air to raisethe'hurnidity of the air to the absolute humidity required, means forvarying the supply of aqueous vapor to change the de- 'gree ofhumidification of the air, and a hu- ,diostat operating under theiniluerrce of the humidified air .to control the said means for varyingthe supply of aqueous vapor.

9. In an air purifying and humidifying aphumidity required,

paratus, the combination of means for pro during a current of an, meansfor sup lying a thin body of hot Water of substantla ly constanttemperature through which the air passes, an eliminator for removing theexcess of water from the air, means for supplying a hot aqueous vapor tothe current of air to raise the humidity of the air to the absolutemeans to impart preliminary heat to the air before bein treated to theaqueous vapor and thin-b0 y of Water, and a thermostat arranged in thepat-h of the current of air to be treated for controlling the means forimparting the preliminary heat whereby the preliminary temperature ofthe air is made practically const ant.

10. In an air humidifying apparatus, the

combination of means for producing a ourrer it of air, means forproviding a hot aque hot aqueous vapor also in the path-of the currentof air to supply to the air the additional humidity to that obtainedfrom-the aqueousbody of constant tem erature to impart a practicallyconstant a solute humidity.

In testnnony of which invention, I have hereunto set my hand.

WM. G. R. BRAEMER.

Witnesses:

R. M. KELLY, M. F. DRIsooLL.

